A kind of nb3al superconducting joint

A technology of superconducting joints and superconducting wires, applied in the direction of connecting contact materials, superconducting magnets/coils, magnetic objects, etc., can solve problems such as complex and harsh process conditions, unstable quality of Al superconducting wires and superconducting joints, and reduce Effects of joint resistance, improved joint current carrying capacity and critical back field

Active Publication Date: 2016-06-01
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the invention is to overcome the Nb in the manufacturing process of existing high-field nuclear magnetic resonance spectrometer superconducting magnets and future commercial thermonuclear fusion device high-field superconducting magnets. 3 The quality of Al superconducting wires and superconducting joints is unstable, and the process conditions are complex and harsh. A new Nb 3 Al superconducting joint

Method used

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  • A kind of nb3al superconducting joint
  • A kind of nb3al superconducting joint
  • A kind of nb3al superconducting joint

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Preparation of Nb 3 Al superconducting connector. First, pure Nb powder and pure Al powder are mixed together according to a 3:1 atomic ratio. The particle size of the powder is 20 microns, and the total mass of the mixed powder is 200 grams; the pure Nb powder, pure Al powder, and 5 grams of sodium stearate powder and 3000 grams of agate material grinding balls are put into the agate material ball milling tank of the planetary ball mill for high-energy ball milling. The high-energy ball milling process is carried out in a vacuum environment, and the vacuum degree is better than 1×10 -2 Pa. Image 6 To prepare high-energy ball milling Nb by planetary ball milling 3 Schematic diagram of the principle of Al supersaturated solid solution powder. After the ball milling is completed, the ball milling jar is placed in a vacuum glove box, and the ball milled Nb-Al supersaturated solid solution powder is taken out in a vacuum environment, and vacuum-packaged and dried and stored...

Embodiment 2

[0040] Preparation of Nb 3 Al superconducting connector. First, mix the Nb-20at%Al alloy powder and pure Al powder together, so that the atomic ratio of Nb and Al in the two powders reaches 3:1. The particle size of the two powders is 200 microns, and the total mass is 200 grams; put Nb-20at% Al alloy powder and pure Al powder, together with 5 grams of dispersant sodium stearate powder and 3000 grams of agate material grinding balls, into the stirring High-energy ball milling is carried out in the agate material ball milling tank of the type ball mill. Figure 7 To prepare high-energy ball mill Nb through agitated ball milling method 3 Schematic diagram of the principle of Al supersaturated solid solution powder. After the ball milling is completed, put the ball mill jar in the vacuum glove box, take out the Nb-Al supersaturated solid solution powder after ball milling, vacuum package and dry storage. Remove Nb 3 The shell material of the Al precursor superconducting wire. In...

Embodiment 3

[0043] Preparation of Nb 3 Al superconducting connector. First, the pure Nb powder and pure Al powder are mixed together in a 3:1 atomic ratio. The particle size of the powder is 100 microns, and the total mass is 200 grams; the pure Nb powder, pure Al powder, and dispersant stearic acid 5 grams of sodium powder and 3000 grams of corundum material grinding balls are put into the corundum material ball milling tank of a vibrating ball mill for high-energy ball milling. Picture 8 To prepare high-energy ball mill Nb by vibrating ball mill 3 Schematic diagram of the principle of Al supersaturated solid solution powder. After the ball milling is completed, put the ball mill jar in the vacuum glove box, take out the Nb-Al supersaturated solid solution powder after ball milling, vacuum package and dry storage. Remove Nb 3 The shell material of the Al precursor superconducting wire. In the vacuum glove box, take the Nb-Al supersaturated solid solution powder and the supersaturated s...

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Abstract

The invention provides an Nb3Al superconduction connector. The appearance of the superconduction connector is of a cylindrical structure and comprises an Nb3Al superconduction wire to be connected, and an Nb3Al sintering block body from inside to outside, wherein the Nb3Al sintering block body wraps the periphery of the Nb3Al superconduction wire. A connector pipe is arranged outside the Nb3AL sintering block body, and the Nb3Al superconduction wire and the Nb3Al sintering block body are placed in the connector pipe. One end of the connector pipe is sealed, and the other end of the connector pipe is open. The pipe wall of the connector pipe is of a double-layer structure, the inner layer is made of Ta, and the outer layer is made of Cu.

Description

Technical field [0001] The invention relates to a superconducting joint, in particular to a Nb 3 Superconducting joint of Al superconducting wire. Background technique [0002] High-field superconducting magnets play an irreplaceable important application in technical fields such as nuclear magnetic resonance, ITER thermonuclear fusion, and high-energy physics accelerators. In the existing superconducting magnet preparation technology, magnets of 10T and below are made of NbTi alloy superconducting wires with excellent mechanical ductility. Since the critical magnetic field of NbTi alloy is low, a higher magnetic field above 10T requires the use of A-15 type intermetallic compound superconducting materials with higher critical magnetic field characteristics to build magnets. The existing 10-20T magnets mostly use NbTi alloy and Nb 3 Sn superconductor hybrid coils are nested. A-15 type intermetallic compound Nb 3 Sn superconducting materials have better economics and higher tech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F6/06H01R4/58
Inventor 程军胜王秋良戴银明刘建华朱光
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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